Singer 20U-105C User Manual

Zigzag Sewing Machine
Instruction Maqnual
and Parts List
SINGER and the Cameo "S" Design are exclusive trademarks of The Singer Company Limited S.à r.l. or its Af liates.
©2017 The Singer Company Limited S.à r.l. or its Afliates. All rights reserved.
20
U
105 / 105C
125 / 125C

Singer 20U-105C Specifications

General

Brand	Singer
Model	20U-105C
Category	Sewing Machine
Language	English

Summary

Safety Instructions

Important Safety Instructions

General safety procedures to follow when operating the machine.

For Safe Operation

Specific safety precautions to avoid electric shock and injuries.

Product Description and Machine Specification

Product Description

Overview and image of the Zigzag Sewing Machine 20U series.

Machine Specification

Technical specifications of the sewing machine models.

Motor, Motor Pulley and V-Belt Specifications

Details about the motor, pulley, and V-belt specifications.

Relationship between Zigzag Bight and Maximum Speed

Correlation between zigzag stitch width and maximum operating speed.

Setup and Adjustment Instructions

Table Cut-Out Drawing

Provides dimensions for cutting a table to fit the sewing machine.

Oil Reservoir Installation

Steps and diagrams for installing the oil reservoir.

Belt Cover Installation

Instructions for correctly installing the machine and motor belt covers.

Lubrication

Guidance on lubricating various parts of the sewing machine.

Needle and Thread

Guidelines for selecting appropriate needles and threads for different materials.

Inserting the Needle

Step-by-step instructions for correctly inserting a needle.

Bobbin Case Attachment

How to correctly attach the bobbin case to the machine.

Bobbin Thread Winding

Procedure for winding thread onto the bobbin, including tension adjustment.

Bobbin Case Threading and Replacement

Instructions for threading the bobbin case and replacing it.

Machine Threading

Step-by-step guide for threading the sewing machine head.

Stitch Length Adjustment

How to adjust the stitch length and reverse stitch length.

Presser Foot Pressure Adjustment

Method for adjusting the pressure applied by the presser foot.

Needle Thread Tension Adjustment

How to adjust the tension of the needle thread.

Thread Take-up Spring Adjustment

Adjusting the pressure and stroke of the thread take-up spring.

Bobbin Thread Tension Adjustment

Adjusting the tension of the bobbin thread.

Needle Position Selector

How to select the needle position for different stitching types.

Stitch Width Regulator

Explains the function of the stitch width regulating lever.

Zigzag Stitch Width Control

How to control the width of zigzag stitches using thumb screws.

Needle Bar Frame Clamp Device

How to clamp the needle bar frame for straight stitching.

Straight and Zigzag Stitch Fitting

Details on changing presser feet, needle plates, and feed dogs.

Spool Cap Usage

Instructions on how to correctly use the spool cap with thread spools.

Thread Anti-Spill Net Usage

Guidance on using the thread anti-spill net for synthetic threads.

Knee Lifter Installation

Steps for installing the knee lifter bracket under the table.

Fittings for Buttonhole Stitching

Components required for buttonhole stitching.

Fittings for Hem Sewing

Parts needed for sewing narrow hems.

Fittings for Zipper and Cord Sewing

Accessories for sewing zippers and cords.

Maintenance

Machine Head Cleaning

How to clean the machine head using a soft cloth.

Lubrication

Re-lubricating the machine if it has been idle.

Safety Inspection

Periodic checks of safety devices and components.

Troubleshooting

Parts List

Face Plate, Arm Top Cover and Arm Side Cover Components

Exploded view and list of parts for the face plate, arm top, and side covers.

Thread Take-up, Arm Shaft and Handwheel Components

Parts diagram and list for thread take-up, arm shaft, and handwheel.

Needle Bar, Presser Bar and Needle Plate Components

Exploded view and parts list for needle bar, presser bar, and needle plate.

Zigzag Triangular Cam and Hook Advancing Crank Components

Diagram and list of parts for zigzag triangular cam and hook advancing crank.

Bight Amplitude, and Bight L-C-R Position Components

Parts diagram and list for bight amplitude and position control components.

Arm Shaft (upright) and Rotating Hook Drive Shaft Components

Parts for the upright arm shaft and rotating hook drive shaft.

Hook and Bobbin Case Components

Diagram and list of parts for the hook and bobbin case.

Feed Regulating Dial and Feed Reverse Lever Components

Parts diagram for feed regulating dial and reverse lever.

Feed Mechanism Components

Parts list and diagram for the feed mechanism.

Presser Bar Lifter and Thread Tension Components

Parts for the presser bar lifter and thread tension mechanisms.

Thread Stand Components

Diagram and parts list for the thread stand.

Accessories and Attachments

List of various accessories and attachments for the sewing machine.

Belt Cover Components

Parts list and diagram for the belt cover assembly.